保证唯一的一种js提交数据方式，还不错

<div class="project_right">
    <div class="project_title_right" id="myright">
          <script languange="javascript">
              var idlist2 = "sel1,sel2,sel3,sel4,sel5,sel6,sel7";
              </script>
            <div class="buy_line">
                <div class="buy_one_seled" id="sel1" onclick="buy_divsel_switch(this,'1',idlist2)">￥1元</div>
                <div class="buy_one_sel" id="sel2" onclick="buy_divsel_switch(this,'2',idlist2)">￥2元</div>
                <div class="buy_one_sel" id="sel3" onclick="buy_divsel_switch(this,'5',idlist2)">￥5元</div>
            </div>
            
            <div class="buy_line">
                <div class="buy_one_sel" id="sel4" onclick="buy_divsel_switch(this,'10',idlist2)">￥10元</div>
                <div class="buy_one_sel" id="sel5" onclick="buy_divsel_switch(this,'50',idlist2)">￥50元</div>
                <div class="buy_one_sel" id="sel6" onclick="buy_divsel_switch(this,'100',idlist2)">￥100元</div>
            </div>
            
            <div class="buy_line">
                <div class="buy_one_sel" id="sel7" onclick="buy_divsel_switch(this,'',idlist2)">其他</div>
                <input type="text" name="selmoney" id="selmoney" value="1" maxlength="10" class="buy_one_other_noshow">
            </div>
            
            <div class="sendArea">
                <button class="btn btn-primary" id="btn_tobuy" style="90%;height:40px;margin-top:20px;">打赏一下</button>
                                     <div class="shuoshuo">(亲,打赏是没有回报的哟)</div>
            </div>
            
        </div> <!-- project_title_right end-->

　　//表单数据

function buy_divsel_switch(obj,setvalue,idlist){
    var ids = idlist.split(",");
        var f_obj = document.getElementById("selmoney");
        
        for(i=0;i<ids.length;i++){
        var tab = document.getElementById(ids[i]);
        f_obj.className="buy_one_other_noshow";
        
        if(ids[i]==obj.id){
            tab.className = "buy_one_seled";
            f_obj.value = setvalue;
            
        }else{
            tab.className = "buy_one_sel";
            
        }
        
        if(obj.id=="sel7"){
            f_obj.className="buy_one_other";
            f_obj.focus();
        }
    }

    }


//选择

<script type="text/javascript">
    $(function(){
             $("#project_btn_act_favorite").click(function(){
                             Dialog_addTaskFavorite('ad5vs8016n');
            });
       
               $("#btn_tobuy").click(function(){
                            var pid = "ad5vs8016n";
                            var ptype = "1006";
                            var gid = pid+"100000";
                             buy0(pid,ptype,gid,1,document.getElementById("selmoney").value);
            });
                       
                popUPDiv("myright","mymark"); 
                $('#collapseOne').collapse('hide'); 
    });

function buy0(pid,ptype,gid,num,money){
            if(!isNumber(money)){
                alert("");
                return;
            }
            if(confirm("")){
                var param = "pid="+pid+"&ptype="+ptype+"&gid="+gid+"&num="+num+"&money="+money;
                projectdobuy(param);
                return;
            }
        }

//确认选择

function projectdobuy(params){
        var url;
	var post;
	var dataType;
	var param;
                    url = "/projectcosttodo.html";
                    post = 'post';
                    dataType = 'json';
                    param = params;

                    $.ajax({
                            "type":post,
                            "url": url,
                            "dataType":dataType,
                            "data":param,
                            "success": function(data){
                               if(data["status"]=="1"){
                               var param = "ordernum="+data["order_id"]+"&paymoney="+data["pay_money"]+"&pid="+data["p_id"];
                               ali_pay_submit(param);
                           }else{
                               
                               alert(data["msg"]);
                           }
                            }
                    });
}
//ajax确认

　　

//pay
function ali_pay_submit(params){
    var url = "/aitaoqian_pay_submit.html?"+params;
    location.href = url;
    return;
}

这个表单主要是利用session防止重复ajax提交，想法蛮奇特的。网址：http://www.itaoqian.net/